Key facts
- Brand
- Maxim
- Model
- DS18B20
- Industry
- Industrial
- Documents
- 3
- Languages
- EN
- Last added
- 2012-05-09
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MAXIM INTEGRATED PRODUCTS DS18B20 Programmable Resolution 1-Wire Digital Thermometer handbook
The DS18B20 provides 9‑ to 12‑bit temperature measurements over a –55 °C to +125 °C range and includes a non‑volatile alarm function. Each device carries a unique 64‑bit ROM code, allowing many sensors to share a single 1‑Wire bus.
Power can be supplied from the data line (parasite power) or an external Vpp supply (3.0 V‑5.5 V). The device supports multiple packages (TO‑92, 8‑pin SO, uSOP) and offers configurable resolution, conversion time, and EEPROM‑stored alarm thresholds.
Maxim DS18B20 specifications
| Temperature range | -55 °C to +125 °C |
|---|---|
| Accuracy | ±0.5 °C from –10 °C to +85 °C |
| Resolution | User‑selectable 9‑12 bits |
| Power supply range | 3.0 V to 5.5 V |
| Maximum conversion time (12‑bit) | 750 ms |
Source: MAXIM INTEGRATED PRODUCTS DS18B20 Programmable Resolution 1-Wire Digital Thermometer handbook
All Maxim DS18B20 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the default resolution at power‑up?
The DS18B20 powers up with a default resolution of 12‑bit.
From: MAXIM INTEGRATED PRODUCTS DS18B20 Programmable Resolution 1-Wire Digital Thermometer handbook
How many devices can share the same 1‑Wire bus?
Because each device has a unique 64‑bit code, the number of devices that can be addressed on one bus is virtually unlimited.
From: MAXIM INTEGRATED PRODUCTS DS18B20 Programmable Resolution 1-Wire Digital Thermometer handbook
What temperature range does the DS18B20 cover?
The DS18B20 operates from –55 °C up to +125 °C.
How can the DS18B20 be powered?
It can be powered from the data line (parasite power) or from an external VDD supply between 3.0 V and 5.5 V.